Hello! I recently purchased some new cacti and succulents of a few different species. I brought them home and repotted them earlier today. I noticed that at the bases of some of the cacti, they are yellow. The yellowness is slightly more soft than the green (although that could just be me being paranoid) and is definitely yellow and not brown. It is not wrinkly or very soft and waxy.
My question is: Is this rot or could there be a different explanation? I unfortunately cannot provide images.
I had one cactus from before (one i rescued from a grocery store) that was definitely having rot. It was a mammillaria cactus and the rotted part was soft and deflated and brown, and really quite gross. I was sure it was rot. With these, I'm not so sure? I'm also hoping this isn't rot because 1) I just bought these from a reputable nursery and they were grown in quality soil (peat free, quick drying) and 2) they're very small cacti and though I've saved a few plants from root rot by cutting them, I don't really think I have enough plant to save. I really hope I don't lose them all